Errno::EINVAL when SSL is enabled and Firefox does not trust self-signed cert

[perlun]

Steps to reproduce

1. Use a self-signed certificate with Puma.
2. Browse to the https://localhost:12345 port.
3. Firefox will show a security warning, asking you to add an exception.

Expected behavior

The request should be processed without errors.

Actual behavior

Error in reactor loop escaped: Invalid argument - getpeername(2) (Errno::EINVAL)
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/minissl.rb:155:in `peeraddr'
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/minissl.rb:155:in `peeraddr'
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/reactor.rb:93:in `rescue in block in run_internal'
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/reactor.rb:73:in `block in run_internal'
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/reactor.rb:43:in `each'
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/reactor.rb:43:in `run_internal'
/Users/plundberg/.rvm/gems/ruby-2.5.1/gems/puma-3.11.3/lib/puma/reactor.rb:154:in `block in run_in_thread'

This is mostly a minor annoyance; after adding the exception it seems to work fine.

System configuration

Ruby version: 2.5.1
Rails version: N/A
Puma version: 3.11.3

[sevenseacat]

I added the security exception in Firefox and I'm still seeing the error in my logs.

Ruby version: 2.5.1
Rails version: 5.1
Puma version: 3.12.0

[sevenseacat]

False alarm - there were a few other domains I needed to add security exceptions for as well!